package com.sky.service.impl;


import com.sky.context.BaseContext;
import com.sky.dto.ShoppingCartDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.ShoppingCart;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.mapper.ShoppingCartMapper;
import com.sky.service.ShoppingCartService;
import com.sky.vo.DishItemVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.List;

@Service
@Slf4j
public class ShoppingCartServiceImpl implements ShoppingCartService {
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private SetmealMapper setmealMapper;
    /**
     * 添加购物车信息
     * @param shoppingCartDTO
     */
    public void addShoppingCart(ShoppingCartDTO shoppingCartDTO) {
     //判断表中是否有商品信息，如果有那就添加数量
        //如果不存在，那就添加一条数据
        ShoppingCart shoppingCart=new ShoppingCart();
        BeanUtils.copyProperties(shoppingCartDTO,shoppingCart);
        Long userId = BaseContext.getCurrentId();
        shoppingCart.setId(userId);
        List<ShoppingCart> list = shoppingCartMapper.list(shoppingCart);
        //如果已经存在，只需将数量加一
        if (list != null && list.size()>0)
        {
            ShoppingCart cart = list.get(0);
            cart.setNumber(cart.getNumber() +1);
            shoppingCartMapper.updateNumberById(cart);
        }
        else {
            Long dishId = shoppingCartDTO.getDishId();
            if (dishId !=null)
            {
                Dish dish = dishMapper.getById(dishId);
                shoppingCart.setName(dish.getName());
                shoppingCart.setImage(dish.getImage());
                shoppingCart.setAmount(dish.getPrice());
                shoppingCart.setUserId(userId);
                shoppingCart.setNumber(1);
                shoppingCart.setCreateTime(LocalDateTime.now());
            }
            else
            {
                //本次添加到购物车的是套餐
                Long setmealId = shoppingCartDTO.getSetmealId();
                Setmeal setmeal=setmealMapper.getById(setmealId);
                shoppingCart.setName(setmeal.getName());
                shoppingCart.setImage(setmeal.getImage());
                shoppingCart.setAmount(setmeal.getPrice());
                shoppingCart.setUserId(userId);
                shoppingCart.setNumber(1);
                shoppingCart.setCreateTime(LocalDateTime.now());
            }
            shoppingCartMapper.insert(shoppingCart);
        }
        //如果不存在，那就添加一条数据
    }


    public List<ShoppingCart> showShoppingCart() {
        Long userId = BaseContext.getCurrentId();
        ShoppingCart shoppingCart = ShoppingCart.builder()
                .userId(userId)
                .build();
        List<ShoppingCart>  list= shoppingCartMapper.list(shoppingCart);
        return list;
    }

    @Override
    public void cleanShoppingCart() {
        //获取当前用户ID
        Long userId = BaseContext.getCurrentId();
        shoppingCartMapper.clean(userId);
    }
}
